The "Request/Response" model is a fundamental communication pattern used in computer networks and web applications. In this model, a client sends a request to a server, asking for specific information or action. The server processes this request and sends back a response, which contains the requested data or a status message indicating the outcome of the request. This model is commonly used in HTTP communications, where web browsers act as clients and web servers respond to their requests. Each interaction typically involves a single request and a corresponding response, making it a straightforward way to exchange information over the internet.